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denpristay [2]
3 years ago
10

Which of the following statements is true? A. A producer usually obtains food by hunting other organisms. B. Humans that prepare

their own meals are producers. C. A producer must be a plant. D. Consumers depend upon producers for food.
Chemistry
2 answers:
olganol [36]3 years ago
6 0

Answer:

D. Consumers depend upon producers for food.

Explanation:

Consumers depend on producers for food because they can not make their own energy-rich molecules. They have to eat other organisms to obtain energy.

liberstina [14]3 years ago
4 0

Answer: it is d

Explanation:

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If element x has 55 protons how many electrons does it have
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Answer: 55

Explanation: A atom consists of a nucleus  and electrons.Nucleus contain neutrons with no charge and protons with positive charge. The electrons bearing negative charge revolve around the nucleus.

An electrically neutral atom contains equal number of protons and electrons. Thus if a neutral element X contains 55 protons, it also contains 55 electrons.

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3 years ago
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Why are bubbles and precipitates both signs of chemical change
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Explanation: Gas bubbles appear after a chemical reaction has occurred and the mixture becomes saturated with gas. The chemical change that creates the gas is completed after the gas bubbles leave the mixture.

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2 years ago
Sorry this is a bit long
Anestetic [448]

The overall balanced reaction equation is;

4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)

<h3>What is the balanced reaction equation?</h3>

The redox reaction equation is said to be balanced when the number of electron gained is equal to the number of electrons lost.

Now;

1. Reduction and oxidation half-reactions

Zn(s) -----> Zn^2+(aq) + 2e

And

NO3^-(aq) ---->NH4^+(aq) + 3H2O(l)

2. Using the H2O and H+ to balance O and H;

4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)

3. Balancing the electrons lost and gained; 4Zn(s) + 10H^+(aq) + NO3^-(aq) + 8e -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l) + 8e

4. The overall balanced reaction equation is;

4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)

Learn more about redox reaction:brainly.com/question/13293425

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Why is it possible to compress a gas
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Gas can be compress easily than liquid or solid because, molecules are more spread in gas than solin or liquid.

Brainliest if this helps you. please

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According to the collision theory, when can a chemical reaction occur?
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when reactants collide with enough energy to intersect their valence shells and form new bonds

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